sdm660-common: Disable sdm rotator downscaler

Rotator down scaler is causing additional delays that are better
handled by GL composition.

Test: Open app, no jank
Bug: 73640835
Change-Id: I6ea9baa28acc222afcf365f3bf107149bc8974d9

vendor.prop

@@ -99,6 +99,7 @@ debug.sf.enable_gl_backpressure=1
 debug.sf.hw=1
 persist.hwc.mdpcomp.enable=true
 ro.opengles.version=196610
+vendor.display.disable_rotator_downscale=1
 
 # DRM
 drm.service.enabled=true